The Watermill... checks its environment every three minutes to determine the dew point and keeps itself operating at just a few degrees below that dew point. This way, it maximizes efficiency of the energy it uses to operate by maximizing the amount of water it can pull from the air 24 hours a day 7 days a week.

It can pull an average of 13 quarts of water each day, which is plenty of potable water for an average family of four.

In the next six months, Element Four promises to bring out a version powered by solar energy; moisture farmers out on Tatooine will appreciate that feature.

For human purposes, however, the water of Tatooine was only marginally accessible. The atmosphere yielded its moisture with reluctance. It had to be coaxed down out of the hard blue sky -- coaxed, forced, yanked down to the parched surface...
(Read more about the Star Wars moisture vaporator)